Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a8fd14510e17938…

MALICIOUS

PDF

184.3 KB Created: 2021-06-14 04:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5f6e5502a8caee4c69b17f9a0ccc1337 SHA-1: 33b8d5376da9876af53d1e7268cfc63e5d32fcd9 SHA-256: 0a8fd14510e17938d43eeaced6c510c783a5506f5ae6aba2c96f2875c0d55e49
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing for credentials or delivering a secondary payload. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://huntic.ru/pbw?utm_term=kamyab+jawan+prime+minister+loan+scheme PDF link annotation
    • https://mibarepazakeme.weebly.com/uploads/1/3/4/6/134685426/nuvafefojad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384639/normal_6060354e54fb5.pdfIn PDF document text
    • https://kibugisire.weebly.com/uploads/1/3/4/0/134018652/6714f5db9d.pdfIn PDF document text
    • https://vujufosidomo.weebly.com/uploads/1/3/1/4/131482916/6946697.pdfIn PDF document text
    • https://nanavefog.weebly.com/uploads/1/3/0/7/130775134/boxevanupodanugud.pdfIn PDF document text
    • https://zexenokupilifuw.weebly.com/uploads/1/3/4/3/134375928/ragepo.pdfIn PDF document text
    • https://xokotenesuku.weebly.com/uploads/1/3/1/4/131438709/a6f68f.pdfIn PDF document text
    • https://serarabasujuz.weebly.com/uploads/1/3/1/6/131606617/palam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368975/normal_601e26ad4461d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443802/normal_60385adb85d42.pdfIn PDF document text
    • https://nenuvive.weebly.com/uploads/1/3/1/4/131483155/13e928.pdfIn PDF document text
    • https://sarununow.weebly.com/uploads/1/3/4/3/134366188/2224010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448744/normal_604e62e348793.pdfIn PDF document text
    • https://votobadopa.weebly.com/uploads/1/3/1/4/131483772/9681362.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426955/normal_5ffba3f543b9f.pdfIn PDF document text
    • https://vavawuzozut.weebly.com/uploads/1/3/1/1/131163550/6617215.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406809/normal_6001f45fc1a6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417213/normal_6015d8bb02849.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CB 153576 bytes
SHA-256: 1e8baec7585252fe52f82eaaae97c84286c85d216454b5b0b5807c89cf999874
font_01_sfnt_off00029cf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29CF4 5552 bytes
SHA-256: a179152bc821fe9ca827131e4e9ca1f0b85fef8fd528b46b0a23dcd16b96f2a7
font_02_sfnt_off0002afc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AFC9 9780 bytes
SHA-256: 96cc74772b4e3914bc41662d2b5baae83f59aeb765e8bfe26949dbd899c4a58a

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